well theres your problem viemacs...
you clearly didn't know/remember about the amiga initiative where they Nearly took QNX RTP6 as their next OS evolution back in 2001.
and there is still a free Full Dan CEO of qnx officially released RTP6.1 ISO around if you look, very nice it is too.
it played generic quake smoother than anything Else at the time ;), yes they ported the engine to RTP6 for fun so you could use the game files .
there was, and so still is a full jvm for RTP J9 from IBM
http://www.openqnx.com/index.php?name=faq&id_cat=4"
QNX is one of the very few certified POSIX OSes so "porting any *nix application should not take more than a recompile" including any other jvm you might like should be simple for a seasoned dev, and the fact that self contained free live CD was your development platform.
found with a very quick search so you can use that or compile some linux version to qnx RTP and use that if you like i guess.
you could even run Amithlon the AMIGA layer port for RTP back in the day http://www.osnews.com/story/414/Review_of_AmigaOSXL_and_Amithlon
http://www.osnews.com/story/21/QNX_RtP_6_1_0_Released
" QNX RtP 6.1.0 Released
posted by Eugenia Loli-Queru on Mon 13th Aug 2001 07:18 UTC
A new version of the QNX RtP, the Real Time desktop OS from QSSL is ready to download.
Released June 29, the QNX RTP now features version 6.1.0 of the QNX RTOS, support for cross-platform development, Dinkum C and C++ libraries, driver development kits, extended driver support, and a host of new Photon applications.
The bare bones download weights 24 MB for the Win9x, FAT32-based version while the ISO image that can be installed in its own partition, is more than 440 MB. Head over to QNXStart for more QNX-related news and software."

what's "Hard to start a developer program in the midst of the current mind share. Namely, Apple and droid." !
you apparently dont know that Dan CEO of QNX already did a 1 million plus download program of the then new 'QNX RTP6' (aka now RIM OS) Free developer Live CD program back in 2000, you can even still get it.
for instance heres some 2003 ftp://ftp.fsn.hu/pub/CDROM-Images/qnx/qnxnc621.iso
the 6.20 2002 and QNXRTP , i think the original 6.0 developers release is in that directory too

well if by interesting you mean , it would be easy for any 3r party to create a far better device as lower cost by simply using the Freescale quad A9 this year,
http://www.linuxfordevices.com/c/a/News/Freescale-iMX-6/
“The i.MX 6 series is Freescale’s first ARM-based multicore SoC and first Cortex-A9 model. The processor advances the i.MX family with dual-stream 1080p video playback at 60 frames per second (fps), 3D video playback at 50Mbps, desktop-quality gaming, augmented reality applications, and novel content creation capabilities, says Freescale.
The SoC is also touted for being one of the first applications processors to offer hardware support for the open source VP8 codec.
VP8 drives the related WebM (MKV) open container format, both of which are supported in the most recent Android 2.3 release….”
“the SoC is claimed to enable 1080p video (single stream) with only 350mW consumption. As a result, the i.MX 6 series can deliver up to 24 hours of HD video playback and 30-plus days of device standby time, claims the company.”
with potentially the Mali-T604
http://www.tomshardware.com/news/ARM-GPU-GPGPU-Mali-T604-Mali-400,11616.html
http://www.rethink-wireless.com/2010/11/11/samsung-backs-arms-souped-up-graphics-platform.htm
"Up to 16 2.5GHz cores can work together"
"DirectX 11 and with OpenCL 1.1"
"the core consumes less than 850 milliwatts." etc, ohh and perhaps a little/lot of the freescale MRAM too :D
http://media.freescale.com/phoenix.zhtml?c=196520&p=irol-newsArticle&ID=1163460&highlight=
job done.

QNX is a great operating system for constrained devices, better than Apple's BSD or Linux, but as you suggest, it's not the best that wins but the best marketed. Look at Beta vs. VHS for an all telling story. Apple buyers are almost zealots, sometimes Apple deserves that devotion, often not, but they understand marketing, you notice it already when you open the box of an Apple product. That's where the user experience starts. Ultimately I agree, Apple has it sown up for the moment.

iPad will definitely stay way out in front for the next year or so, but Android devices will eventually catch up and surpass Apple by undercutting costs. However, Google needs to sort out access to its apps store. Right now in too many cases you buy an Android from A N Other and you get tied into that company store and Google Apps are hard to access from that machine.

RIM using QNX for their tablet? Can the RTOS compete with what Apple's done with a mix of open source and in-house? Hard to start a developer program in the midst of the current mind share. Namely, Apple and droid.